No. 22.] HYMENOPTERA OF CONNECTICUT. 



729 



continuous, that on fourth of the same color as the 

 other fasciae; second to fourth ventral abdominal segments 

 with apical fasciae; labrum, mandibles, first three joints of 



antennas, and legs red; length 11-12 mm lunatus 



Mesonotum with a subcordate enclosed space; fascia inter- 

 rupted on first and second dorsal abdominal segments, 

 gradually widened on sides of second segment; space on 

 mesonotum trilobed; an L-shaped patch of pubescence on 

 pleurae; scutel sub-bilobed; spines distinct; length 10-14 



^^ remigatus 



4. Ornaments cream-color; pectus finely and closely punctate; 

 false pygidium large; pleurae with a lunate patch; femora 

 usually more or less black; labrum, mandibles, scape, 

 tubercles, and tegulae usually red; legs rarely black; length 



^^2 mm cr«ssom 



Ornaments cinereous; length 11-12 mm donatus 



Males. 



1. Border of first dorsal abdominal segment broader laterally, 



forming lunate or subquadrate patches; ornaments cream- 

 color 2 



Border of first dorsal abdominal segment hardly broader 

 laterally than near middle; mesonotum bilineate 5 



2. Disc of mesonotum not enclosed by a complete border; orna- 



ments cream-color; tibiae and tarsi usually red; mid and 

 hind femora more or less black; mandibles, labrum, base of 

 antennae, and tegulae red; rarely entirely black; length 



8-1 1 mm cressoni 



Disc of mesonotum enclosed by a complete border; abdomen 

 with six bands, interrupted on first and second segments, 

 gradually widening on sides of second, cinereous on sixth; 

 length 10-15 nini remigatus 



3. Mesonotum anteriorly with a broad band; abdomen with 



five bands, first dorsal segment with its band continuous 

 or interrupted, second to fifth with continuous fasciae; 



black; length 12-15 mm concavus 



Mesonotum bilineate; abdomen with six bands, bands on first 

 two dorsal segments and sometimes on third interrupted, 

 and cinereous or whitish on fifth and sixth segments; 

 labrum, mandibles, first three antennal joints, tegulse, and 

 legs red; length 10-13 mm lunatus 



T. lunatus Say. Howard, Insect Book, PI. iv, Fig. 18. 



Saybrook, 31 August, 1904 (H.L.V.), on flowers of fireweed 

 (Erechtites hieracifolia) ; East Hartford, 2 August, 1905 

 (B. H. W.). 



